Content

References to standards

Introduction

Use of this manual
Responsibility of the CCR Liberty user
Documentation
User support

Technical data

Depth limits
Water temperature limits
CO₂ scrubber duration limit
Weight

References to standards

CCR Liberty is a personal protective equipment that is legislatively regulated by REGULATION (EU) 2016/425 OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 9 March 2016 on personal protective equipment.
This personal protective equipment has been designed and tested to a harmonised standard EN 14143:2014 Respiratory equipment - Self-contained re-breathing diving apparatus. EN 12021:2014 Respiratory equipment - Compressed gases for breathing apparatus. The standard was taken into account during testing.
Third party reference to standards
Third party products that have been tested and certified by their manufacturers are an integral part of this personal protective equipment. In the process, certificates referring to the following harmonised standards are provided: EN 144-1:2018
EN 144-3:2003
ISO 12209-2:2013
EN 250:2014
EN ISO 9809-1:2019
EN ISO 9809-2:2019
Directive 2014/68/EU - pressure equipment

RISK CATEGORIES OF PPE
According to Annex I of Regulation (EU) 2016/425, which defines the risk categories of personal protective equipment, CCR Liberty and Liberty Sidemount belong to Category III. Category III includes exclusively the risks that may cause very serious consequences such as death or irreversible damage to health relating to the following:

(b) atmospheres with oxygen deficiency;
(i) drowning;

This personal protective equipment is designed for underwater use. The risks against which it is intended to protect are staying in an oxygen-deficient environment (underwater) and drowning. The PPE protects against these risks only when used correctly. This product may only be used if the person using it is thoroughly familiar with this manual, has received training from an accredited training agency specifically designed for diving with the Liberty CCR or Liberty Sidemount. The user of the device must be certified by the appropriate agency to use the CCR Liberty or Liberty Sidemount.

Introduction

Use of this manual

This user manual is part of the CCR Liberty documentation.

The CCR Liberty is intended to be used exclusively by a trained person who is capable of fully understanding the instructions contained in this manual or is in the process of training with the CCR Liberty in a course accredited by the manufacturer. The training course prerequisites are set by cooperating agencies.

Responsibility of the CCR Liberty user

Strong emphasis was placed on reliability during the development of the CCR Liberty. Internal parts are individually separated to minimize the impact that a failure of any given part may have on the rebreather’s basic functionality. Several systems have multiple backups. The logic behind the CCR Liberty is that the controls will never prohibit the start of a dive, even if malfunctions are detected. The system never locks out the diver; instead, the system will indicate the status of the unit in light of any damage if able to do so. When cave diving, the inability to submerge can mean not being able to return from a dive; therefore, the CCR Liberty does not impede submersion.

It is always the user’s responsibility to decide whether he/she switches to a backup apparatus or chooses to begin a dive with a partially malfunctioning rebreather.

A CCR Liberty user must accept the fact that diving involves risk. Following everything the user has learned by reading the CCR Liberty’s technical manual and during their training on the rebreather can only reduce the risk. Diver safety is increased through by regular training, methodical education, and following good diving practices. Diving with a rebreather requires a far greater degree of discipline and awareness compared to diving with an open-circuit apparatus.

If you do not accept this risk and you are not a trained, careful, and disciplined diver, do not dive with the CCR Liberty.

The manufacturer does not bear any responsibility for the use of the CCR Liberty if the apparatus has been modified in any way that is not stated in this manual or in the technical guidelines issued by the manufacturer.

Documentation

Version

The technical documents are subjected to a process of continual development and improvement. Therefore, please regularly check the website at divesoft.com for updates.

This manual provides operating instructions for the hardware and software (firmware) version of the CCR Liberty written on the tittle page.

Technical guidelines

The manufacturer can issue technical guidelines. It is strongly recommended that the user regularly checks divesoft.com for new guidelines. Registered users will receive notifications by e-mail.

Document updates

The electronic form of the manual is always available in its complete, updated form. The electronic and printed forms of the manual may not be completely identical. In case of insignificant changes (correction of minor typing errors, for example), only the electronic version is updated.

User support

Registered users are entitled to technical support. The extent of free support can be limited. The technical support department at Divesoft s.r.o. will provide limited support for potential and unregistered users. Prior to submitting a question, please familiarize yourself with the general principles of trimix rebreather diving and the CCR Liberty technical documents available for free

Technical data

Depth limits

The maximum depth for which the CCR Liberty meets the requirements of the Harmonized Standard EN 14143:2013 is 40 m.

The Liberty rebreather is depth limited at 170m (557ft) due to the use of the Apeks DST4 Environmentally sealed 1st stage regulators. It is recommended that to dive beyond 170M (557ft) the Apeks DST4 1st stages MUST be changed with the Apeks UST4 kit. This does not apply to the Sidemount version, which uses first stages without a dry chamber.

Diluent / Max. depth

• Air : 40 m

Water temperature limits

The CCR Liberty is intended for use in water temperatures above 4 °C and below 34 °C according to the requirements of EN 14143:2013 (Article 5.1).

The minimal temperature is determined through CO₂ scrubber duration tests, which are performed at 4 °C.

CO₂ scrubber duration limit

The maximum safe operating period of the sorbent is 168 min, determined by a test in accordance to EN 14143:2013 (Article 6.6.2). During the test, 1.6 l/min of CO₂ were added to the breathing loop with a ventilation rate of 40 l/min and an exhalation temperature of 32±4 °C; the unit was submerged in 4° C water to a depth of 40 m with a ppCO₂ of 5mBar.

The sorbent’s actual maximum operating period can differ depending on the sorbent, temperature, depth, and the diver’s physical effort.

Under normal conditions, scrubber duration ranges from 4 h in deep cold water with moderate work to 6 hours for a minimal working dive. For details see section 3.2.1 Sorbent service life.

CO2 Absorbent material
Tests were performed with SOFNOLIME 797 absorbent material from Molecular Products. CCR Liberty and Liberty Sidemount may only be used with Molecular Products' SOFNOLIME 797. Any other absoption materials are prohibited for use with CCR Liberty and Liberty Sidemount.

Weight

The total ready-to-dive weight of The CCR Liberty (including scrubber), is approx. 37 kg.

For details see part 1.15 Weights of individual parts.

Service intervals

The recommended service intervals are at 1 year, 3 years and 5 years.

The servicing of the unit can only be performed by authorised service technician or technical centre.

Not performing services at regular intervals may result in voiding your warranty.